async void RemoveRole(IEnumerable <Row> p_rows)
{
var userID = _lvUser.SelectedRow.ID;
List <long> roles = (from r in p_rows
select r.Long("roleid")).ToList();
if (roles.Count > 0 && await AtCm.RemoveUserRoles(userID, roles))
{
_lvRole.Data = await AtCm.Query("用户-关联角色", new { userid = userID });
}
}